Ahead of their clash against Bayer Leverkusen tonight, GiveMeFootball highlight some of the danger-men who could cause the Blues problems.
Andre Villas-Boas' side host the German outfit in their opening clash of Champions League Group E, and last season's Bundesliga runners-up will believe they have the weapons to cause problems at Stamford Bridge.
The former Chelsea midfielder will believe he has a point to prove after his west London release back in 2010. Previously the captain of Germany, Ballack returned to the club he helped reach the final of this competition back in 2001, and was instrumental in their domestic improvement last term.
With two appearances to his name this term, manager Robin Dutt appears to be using the player sparingly, suggesting the powerful 34-year-old will be fit and ready for the challenge on tonight's return.
With international recognition coming the way of the 23-year-old Brazilian, the former Flamengo starlet has enjoyed a rise to prominence at the BayArena.
A versatile winger who can also play in an attacking midfield position, Augusto has two assists to his name in five Bundesliga appearances so far this season, and the former Manchester City target's creativity could be key to the visitors enjoying success in London.
One of German football's rising stars, the 20-year-old forward has four goals in eight appearances at international level, and is hoping to reproduce that form for Leverkusen after his summer switch from Mainz 05.
Schurrle is yet to score for his new club though, with just five league appearances to his name following the reported €8 million move. His ability is not in question though, notching 15 goals last term at the Coface Arena and eager to make his mark at the highest level domestically.
Prolific in the 2009/10 season, Kießling enjoyed a far less successful spell last term, but has hit the ground running once again this year with two goals in five Bundesliga games.
The 27-year-old, who has six caps for Germany and represented his country in the 2010 World Cup, is a 6ft 4in striker capable of posing an aerial threat to the Blues. Good in the air, Kießling also has good feet for a so-called 'big man'.
Another German international, Rolfes has found himself at the heart of the Leverkusen midfield for six-years, and has started every game for his side so far this season.
The 29-year-old anchors the midfield, potentially allowing Ballack to push forward and support the attacking pair. With an eye for goal, Rolfes has also notched 30 league goals during his time with the side currently sitting fourth domestically and unbeaten in four.